* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.w {
    margin: 0 auto;
    width: 1470px;
}

body {
    background-color: #000;
    font-family: 'PingFang SC';
    font-size: 20px;
    color: #fff;
}

em,
i {
    font-style: normal;
}

li {
    list-style: none;
}

img {
    border: 0;
    vertical-align: middle;
}

button {
    cursor: pointer;
}

a {
    color: #fff;
    text-decoration: none;
}


button,
input {
    border: 0;
    outline: none;
}

.clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0;
}

.clearfix {
    *zoom: 1
}